Experimental demonstration of modified constant modulus algorithm with polarization demultiplexing in Stokes space in optical coherent receiver

IF 2.2 3区物理与天体物理 Q2 OPTICS

Optics Communications Pub Date : 2025-03-28 DOI:10.1016/j.optcom.2025.131763

Bohang Huang, Xiangyong Dong, Fengjie Shi, Zhenming Yu, Kun Xu

引用次数: 0

Abstract

Constant modulus algorithm (CMA) is widely applied for polarization demultiplexing in coherent optical communication system. However, the singular value problem always plagues CMA. Modified CMA based on polarization demultiplexing in Stokes space (SS-PDM) was proposed to avoid the singular value problem in simulation. Here we firstly experimentally demonstrate the modified CMA based on SS-PDM in optical coherent receivers. We conduct experiment of 40-Gbit/s polarization multiplexing (PDM) QPSK to verify this method. The experimental results show that the singularity problem of CMA disappears for Polarization-dependent loss (PDL) of 2.7 dB and 4.8 dB by using the modified CMA and the convergence speed of the modified CMA increases significantly compared with that of conventional CMA.

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光学相干接收机Stokes空间偏振解复用改进等模算法的实验验证

恒模算法（CMA）广泛应用于相干光通信系统的偏振解复用。然而，奇异值问题一直困扰着CMA算法。为了避免仿真中的奇异值问题，提出了基于Stokes空间极化解复用的改进CMA算法。本文首先在光相干接收机中实验验证了基于SS-PDM的改进CMA。通过40 gbit /s偏振复用（PDM） QPSK实验验证了该方法。实验结果表明，在极化相关损耗（PDL）为2.7 dB和4.8 dB时，改进的CMA消除了CMA的奇异性问题，并且与传统CMA相比，改进的CMA收敛速度显著提高。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Optics Communications 物理-光学

CiteScore

5.10

自引率

8.30%

发文量

681

审稿时长

38 days

期刊介绍： Optics Communications invites original and timely contributions containing new results in various fields of optics and photonics. The journal considers theoretical and experimental research in areas ranging from the fundamental properties of light to technological applications. Topics covered include classical and quantum optics, optical physics and light-matter interactions, lasers, imaging, guided-wave optics and optical information processing. Manuscripts should offer clear evidence of novelty and significance. Papers concentrating on mathematical and computational issues, with limited connection to optics, are not suitable for publication in the Journal. Similarly, small technical advances, or papers concerned only with engineering applications or issues of materials science fall outside the journal scope.